What this means
The IEEE assigned the MA-M block 4C65A84 to Plus One Japan Limited. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 4C:65:A8:4, it is Plus One Japan Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 4C65A84?
4C65A84 is registered to Plus One Japan Limited in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Plus One Japan Limited's block covers 1,048,576 addresses.
What devices use 4C65A84?
Any network device with a MAC address starting 4C:65:A8:4 was manufactured by or for Plus One Japan Limited.